碰摩转子轴承系统非线性振动特征的实验研究

建立了转子碰摩故障的实验装置,通过实验研究了转子系统碰摩故障的非线性振动特征,发现对油膜力影响较小的系统,转定子碰摩使系统产生了半频及高频分量,而对于滑动轴承支撑的系统,较小的碰摩间隙使得系统在油膜涡动之前产生碰摩,系统产生了丰富的高频分量;当碰摩间隙较大时,碰摩在油膜涡动之后发生,此时碰摩对系统的影响很小,轴承油膜力对系统的影响最大·

Experimental Investigation on Nonlinear Vibration Characteristics of Rotor-Bearing System with Rub-Impact Fault

An experimental setup was developed to investigate nonlinear vibration characteristics of rotor bearing system with rub-impact fault. It is found that in a system where the effect of oil film force is comparatively small, the rub-impact action will cause the system to form sub-and super-harmonic vibration components, whereas in a system supported by sliding bearings a lot of super-harmonic vibration components will form because the very thin clearance between rotor and stator causes them to rub and impact each other before oil film whirl. In case the clearance is comparatively thick, they will rub and impact each other after oil film whirl and the rub-impact effect will be very small on the system at that moment with a maximum effect of oil film force in bearing on the system.